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The Tropaeolaceae (nasturtium family) contains the single genus Tropaeolum, which in New York is represented by the cultivated ornamental commonly known as nasturtium. Note that this is not the same as the genus Nasturtium, commonly known as watercress, in the family Brassicaceae below.[1]

↑Flora of North America (based on Lihová et al. 2006) states that the tetraploid European and octaploid Asian populations of Cardamine flexuosa should be treated as two distinct species. Both taxa are found in similar habitats. It is not known which these (or whether both of these) taxa have naturalized in New York.